Furnace-door-operating device



1,613 490 4 1927 D. s. TEWKSBURY ET-AL FURNACE DOOR OPERATING DEVICE Filed Feb. 26, 25

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' 6. JEW/fbu Patented Jan. 4, 1927.

DANA S. TEWKSBURY AND ALBERT E. NEWTON, OF KANKAKEE, ILLINOIS. I

FURNACE-DOOR-OPERATXNG DEVICE.

Application filed February 26, 1925. Serial No. 11,830.

This invention relates to slidably mounted furnace fuel doors, and has for one of its objects the provision of novel and simple means through the medium of which a door of this character may be readily raised into opened position and which will when released permit the door to rapidly gravitate to closed position.

With the above and other objects in view,

the invention consists of the construction,

combination and arrangement of parts hereinafter fully described and claimed, and illustrated in the accompanying drawing, wherein:

Figure l is a view in front elevation of a furnace illustrating the application of the door operating means,

Figure 2 is a sectional view taken on the horizontal plane indicated by the line 2-2 of Figure 1,

Figure 3 is a sectional view taken on the vertical plane indicated by the line 3-3 of Figure l, and

Figure 4 is a sectional view taken on the vertical plane indicated by the line 4-4 of Figure 1.

Corresponding and like parts are referred to in the following description, and designated in the several views of the drawing, by similar reference characters.

In the drawing 1 designates the fuel door, 2 the fuel door casing, 3 the ash pit door, and 4: the body of a furnace which may be of any well known or appropriate construction.

The door 1 is slidably mounted upon the casing 2 through the medium of vertical flanges 5 at the lateral sides of the casing and vertical channel bars 6 at the lateral edges of the door. The opposing sides 7 and 8 of the flanges 5 and bars 6, respectively, are downwardly and inwardly inclined to cause the door 1 to move inwardly during its downward or closing movement, whereby to establish an air tight connection between the door and the casing 2 when the former is in fully closed position. The downwaird or closing movement of the door 1 is limited by pins 9 which are positioned for contact by the lower edge of the door when the latter is in fully closed position.

A lever 10 mounted upon a pivot 11 for movement in a plane substantially parallel with the front side of the door 1 provides means by which the door may be raised into opened position. The pivot 11 is carried by a bracket 12 secured to the furnace at one side ofthe door 1 and at a point between the 7 upper and lower edges thereof. The lever 10 extends inwardly and outwardly beyond the pivot 11, and the inner portion thereof curves downwardly and is provided at its lower end with an inwardly directed angular lug 18. The upper side of the lug 13 is of arcuate formation and contacts with a flange 14: secured to and extending outwardly from the door 1 near the lower edge thereof. The outer portion of the lever 10 inclines upwardly and is provided with a plurality of openings 15 through one of which passes the angular upper end 16 of a Verticallink or rod 17. A nut 16 mounted upon the angular end 16 prevents the link or rod 17 from becoming accidentally disconnected from the lever 10. The lower end of the link or rod 17 is pivotally connected as at 18 to the outer end of an arm 19 which has its inner end pivoted as at 20 to the furnace. As the lever 10 is provided with a plurality of the openings 15, the link or rod 17 may be connected'thereto at the desired or required distance from its pivot 11. A lever 21 located below the arm 19 is pivoted as at 22 to the furnace and is provided at its outer or free end with a foot plate 23. A link or rod 24 is pivotally connected to the arm 19 and pedal lever 21 intermediate the ends thereof as at 25 and 26, respectively. A counter-balancing weight 27 is connected to the outer end of the arm 19 by a hooked rod 28.

A downward pressure applied to the pedal lever 21 will, due to the connection between this lever and the lever 10, rock the latter lever upon its pivot 11 in a direction to swing its inner end upwardly, and this movement of the lever 10 will raise the door 1 into opened position, as indicated in dotted lines in Figure 1. ll hen the pedal lever 21 is released, the door 1 will gravitate to closed position. The counter-balancing weight 27 permits the door 1 to be opened with comparatively little effort, and said weight tois merely illustrative and does not pretend to give exact proportions. Furthermore, the said drawing is illustrative of a preferred construction, it being our expectation that various changes and modifications may be made Without departing from the spirit and scope of the invention.

What is claimed is z- Means for. opening a slidably mounted furnace door comprising a lever having engage'ment with the door a normally upward- 1y inclined arm pivoted at its inner end below the lever, a link connected to one end of the lever and to the free end of the arm, a pedal lever, an inclined link pivotally conneoted to the arm adjacent its inner end and to the pedal lever, and a counterbalancing Weight connected to the free end of the arm. In testimony whereof We afiix our signatures.

DANA S. TE'WKSBURY. ALBERT E. NEVTON. 

